Jason Mantzoukas (; born December 18, 1972) is an American comedic actor best known for his recurring roles as Rafi in the FX comedy series The League and Nuclear Nadal in The Dictator. Mantzoukas has also appeared in the films Sleeping with Other People, They Came Together, and Conception. He has had recurring roles on the three TV shows created by Michael Schur: Parks and Recreation as Dennis Feinstein; Brooklyn Nine-Nine as Adrian Pimento; and The Good Place as Derek. He also voices the character Jay Bilzerian in the Netflix TV show Big Mouth. He co-hosts the popular film discussion podcast How Did This Get Made? alongside Paul Scheer and June Diane Raphael.